On Fri, Nov 04, 2022 at 03:35:51PM -0700, Rick Edgecombe wrote: > From: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx> > > Add three new arch_prctl() handles: > > - ARCH_CET_ENABLE/DISABLE enables or disables the specified > feature. Returns 0 on success or an error. > > - ARCH_CET_LOCK prevents future disabling or enabling of the > specified feature. Returns 0 on success or an error > > The features are handled per-thread and inherited over fork(2)/clone(2), > but reset on exec(). > > This is preparation patch. It does not implement any features. Urgh... so much for sharing with other architectures I suppose :/ The ARM64 BTI thing is very similar to IBT (except I think their approach to the legacy bitmap is much saner). Given that IBT isn't supported and needs the whole legacy bitmap mess, do we really want to call this CET ? Why not just make a Shadow Stack API and tackle IBT independently.
